D800e with 24-70 on a vacation in London?

Hello all. I'm going on a vacation to London this summer, and I'm worried about taking my D800e with 24-70 kit because of the chance that it will get stolen. Am I too worried? Should I leave it home and take a lesser kit (d90 with 24-200 VR, or gasp! a point and shooter?). I'd leave it around my neck at all times if I took the d800e, and have it insured, but it will stick out like a massive temptation to pick pockets. I've heard stories of thieves unlatching the lenses, etc. Opinions?